package com.six.marketing.service.impl;

import com.six.marketing.service.PaymentService;
import com.six.marketing.service.RedisService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class PaymentServiceImpl implements PaymentService {

    @Autowired
    private RedisService redisService;

    @Autowired
    private CouponService couponService;
    private Object nonce;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void processOrder(String userId, String orderId) {

        // 1. 身份验证与授权
        if (!authService.verifyApiKey(apiKey)) {
            throw new UnauthorizedException("Invalid API key");
        }

        // 2. 防止重放攻击 (检查Nonce是否唯一)
        if (redisService.exists(nonce)) {
            throw new ReplayAttackException("Duplicate request detected");
        }
        redisService.storeNonce(nonce, 15); // Nonce有效期为15分钟

        // 3. CSRF防护
        if (!csrfService.verifyCsrfToken(csrfToken)) {
            throw new CsrfAttackException("Invalid CSRF token");
        }

        // 4. 数据完整性检查 (验证数字签名)
        if (!securityService.verifySignature(orderId + paymentDetails, signature)) {
            throw new InvalidSignatureException("Data integrity check failed");
        }
        try {
            // 1. 检查是否有可用优惠券
            String couponId = couponService.getAvailableCouponForUser(userId);
            if (couponId != null) {
                // 2. 如果有优惠券，执行冻结逻辑
                freezeCoupon(couponId);
                // 将扣除状态存储到Redis
                redisService.setCouponStatus(orderId, "FROZEN", 15); // 15分钟超时
            } else {
                //打印日志
            }
            // 3. 支付处理逻辑
            boolean paymentSuccess = processPayment(orderId);
            if (paymentSuccess) {
                // 4. 如果有优惠券，确认优惠券扣除
                if (couponId != null) {
                    confirmCoupon(couponId);
                    redisService.setCouponStatus(orderId, "CONFIRMED", 15); // 更新状态
                }
            } else {
                // 支付失败，执行回滚
                throw new RuntimeException("Payment failed");
            }
        } catch (Exception e) {
            // 如果有优惠券，则回滚优惠券冻结状态
            String couponId = redisService.getCouponStatus(orderId);
            if ("FROZEN".equals(couponId)) {
                rollbackCoupon(couponId);
                redisService.setCouponStatus(orderId, "CANCELLED", 15); // 更新状态
            }
            throw e;
        }
    }

    private void freezeCoupon(String couponId) {
        // 冻结优惠券的逻辑
        System.out.println("Coupon " + couponId + " frozen");
    }

    private void confirmCoupon(String couponId) {
        // 确认优惠券扣除的逻辑
        System.out.println("Coupon " + couponId + " confirmed");
    }

    private void rollbackCoupon(String couponId) {
        // 回滚优惠券的逻辑
        System.out.println("Coupon " + couponId + " rolled back");
    }

    private boolean processPayment(String orderId) {
        // 支付处理逻辑，可以模拟支付成功或失败
        return true; // 模拟支付成功
    }
}
